641.01
Description. This specification
gives general requirements for various kinds of retroreflective pavement
markings. Deviations from these general requirements are covered in the specific
requirements for each marking type.

Place all pavement markings according to the
OMUTCD.

641.02
Materials. Use marking materials that are a formulation, identified by a manufacturer’s code number, prequalified
by the Laboratory and that have the same composition as the prequalified
marking material.

The Laboratory will require that the materials
pass a service test according to Supplement 1047 before prequalifying them.
Furnish prequalified materials conforming to Supplement 1047 and supplied by
manufacturers conforming to Supplement 1089.

Minimum material performance requirements and
chemical and physical properties are stated in Item 740 and the Invitation for
Samples for the service test performed according to Supplement 1047.

Materials and manufacturers will be listed on the
Laboratory’s Approved List.

Any materials delivered without a TE-24 and
applied without laboratory approval shall be removed. Laboratory tested
materials not meeting specifications shall be removed from the project site.

Furnish a material safety data sheet (MSDS) for
each material, including resin, catalyst, primer, adhesive, activator, glass
beads, and cleaning solvent, to be used on the project to the Engineer before material delivery. Inform workers of the location of all MSDS and allow
workers an opportunity to review them.

641.03
General. Apply lines as solid,
broken, or dotted lines, either singly or in combination, as shown on the
plans. Apply broken lines in a 40-foot (12.0 m) cycle consisting of a 10-foot
(3.0 m) dash and a 30-foot (9.0 m) gap between broken lines, unless otherwise
shown on the plans. Use an accurate striping mechanism that is capable of
being easily adjusted to retrace existing broken markings or to apply new
materials at the correct spacing. Begin broken lines that are to be applied
over plainly visible existing broken lines within 6 inches (150 mm) of the
beginning of the existing broken line, unless otherwise directed by the
Engineer. Apply dotted lines in an 8-foot (2.4 m) cycle consisting of a 2-foot (0.6 m) dot and a 6-foot (1.8 m) gap between dots for line extensions and in a
12-foot (3.6 m) cycle consisting of a 3-foot (0.9 m) line segment and a 9-foot
(2.7 m) gap for lane drop/add markings.

Fill gaps that were
not marked as a result of template use for spray-applied auxiliary markings
with marking material after the template is removed. If applying extruded
thermoplastic, the Contractor may leave small gaps in arrows or letters resulting from template use unfilled.

Ensure that pavement
markings are free of uneven edges, overspray, or other readily visible defects
that detract from the appearance or function of the pavement markings.

Ensure that lines are
sharp, well defined, and uniformly retroreflective. Apply the lines to the
width specified ±1/4 inch (6 mm).
Fuzzy lines, excessive overspray, or non-uniform application are unacceptable. The Engineer will inspect lines at night to verify proper retroreflectivity. Correct pavement markings that are improperly applied, located, or
reflectorized. Reapply lines applied with insufficient material quantities
according to 641.11 or 644.04. Remove improperly located lines according to
641.10, and apply new lines in the correct locations.

Reapply any lines
applied with non-specification materials.

Obtain the Engineer’s approval for methods and equipment used for pavement preparation, marking, and marking removal. Keep glass beads dry during storage and before use.

Furnish to the
Engineer at least 3 days in advance of installation current copies of the manufacturer’s instructions and recommendations for application of any marking material, including primer, activator, catalyst, and adhesive, shown on the plans.
Schedule and perform other construction work, such as shoulder paving, seeding,
and mulching in a manner to avoid damage to applied pavement markings.

Do not apply pavement marking materials to the reflector of a plowable raised pavement marker. Interrupt the
application of the pavement marking line at each raised pavement marker where
marking material would otherwise be applied to the marker’s prismatic
reflector. Provide a maximum gap in the marked line of 18 inches (0.5 m) at
each marker. Remove pavement marking material applied to a prismatic reflector
surface, or replace the reflector that same workday. If material must be
removed from the reflector, restore the reflector’s brightness to its prior
condition.

641.04
Equipment. Equip long line pavement marking equipment for traffic
paint, polyester, epoxy and work zone marking Item 642 with a computerized Data
Logging System (DLS), including a cab mounted display which shows the actual
material application rate and film thickness. For center line, lane line and
edge line markings, when the length of marking exceeds 0.5 miles (0.8 km) of
continuous line equivalent, document the following with the DLS:

2.Measure and record
weight and/or volume amount of material used by color,

3.Measure and record
weight of glass beads,

4.Measure and record
pavement surface temperature,

5.Measure and record air
temperature,

6.Measure and record dew
point,

7.Measure and record
humidity,

8.Calculate and record
average material application rate and film thickness over the section painted.

Record as a separate DLS report line entry the
above information for each route section painted, when the length of center
line, lane line and edge line marking exceeds 0.5 miles (0.8 km) of continuous
line equivalent. A route section is defined as one direction of a contiguous
section of highway (without breaks) with the same route number designation.
DLS documentation is not required for center line, lane line and edge line
markings of 0.5 miles (0.8 km) or less, and for channelizing lines of any length.

If the DLS equipment fails, finish that day’s work
only and resume when the DLS equipment is working.

The Department will provide a standard DLS
spreadsheet, which prescribes the correct DLS report format and content prior
to beginning of work.

On the first working day following application of
markings requiring documentation with the DLS or upon demand, furnish the
Engineer a copy of the DLS report in ODOT standard DLS report format. The DLS report can be provided in one of the following methods, which should be agreed upon at
the preconstruction meeting:

1. hand delivery of paper report

2. fax delivery of paper report

3. e-mail of Excel spreadsheet file

4. disk or flash drive transfer of Excel
spreadsheet file

Within two weeks of the date of application of
markings requiring documentation with the DLS, furnish the Engineer the Excel spreadsheet file of the DLS report in ODOT standard DLS report format by e-mail at
the e-mail address provided at the preconstruction meeting.

At the end of the project, furnish the Engineer all Excel spreadsheet files in ODOT standard DLS report format.

Each DLS shall have an annual calibration of all
mechanical and electrical components and its software function and output
confirmed by the DLS manufacturer or their designated representative. Evidence
of the annual calibration shall be carried by a signed and dated stamp or seal
affixed to the inside of the driver’s door of each striper.

641.05
Pavement Preparation. Clean all visible loose or foreign material from the surface to be marked. Equip
the pavement marking equipment with an air jet to remove all debris from the
pavement in advance of the applicator gun. Operate the air jet when marking
material is being applied, and synchronize it with marking material application. Power-broom clean all surfaces where gore markings or edge lines are to be
applied. If required by the Engineer, also power-broom clean other surfaces. Do not apply marking to portland cement concrete until the concrete in the areas to be
marked is clean of membrane curing material and is dry.

641.06
Layout and Premarking.
Lay out the locations of all lines, words, and other symbols to ensure their
proper placement. Do not start marking operations until the Engineer or the
Engineer’s representative has approved the layout and premarking lines If
applying longitudinal or transverse lines, use existing lines, construction
joints, or premarking to guide this marking equipment.

On projects where resurfacing or other operations
will result in obliteration of the existing pavement markings, establish
reference points to ensure proper placement of restored markings. If existing
markings are to be retraced, verify any adjustment in the location with the
Engineer.

Establish “T” marking of no-passing zones according
to the plans or a no-passing zone log provided by the Engineer.

Locate premarking from survey data or reference
points, and offset it so as to parallel the theoretical edge of the marking
lines at a maximum distance of 1 inch (25 mm). Use templates for the layout of arrows, words, and other symbols. Place premarking for longitudinal lines at
40-foot (12 m) intervals, and do not exceed 2 inches (50 mm) in width or
12 inches (300 mm) in length. Locate premarking for auxiliary markings
from the plans or schematic forms provided by the Engineer.

641.07
Line Placement Tolerance. Ensure that pavement marking lines are straight or smoothly curved, true to the
alignment of the pavement, and do not deviate laterally from the proper
location at a rate of more than 2 inches in 100 feet (50 mm in 30 m). The
Engineer will not allow any deviation greater than 3 inches (75 mm). Remove
improperly located lines according to 641.10 and apply new lines in the correct
locations.

641.08
Marking Types. Apply marking materials at the rate or thickness specified in 642.04, 643.04, 644.04, 645.03,
646.05, or 647.04 and, except for parking lot stall markings, ensure that they are uniformly retroreflective. However, ensure that portions of parking stalls
that are adjacent to street traffic are retroreflective. Pavement markings consist of the following types:

A. Edge Lines. Place edge lines as continuous 4-inch (100 mm) wide stripes. Locate the center of the
stripe 6 inches (150 mm) from the edge of the pavement.

B. Lane Lines. Place lane lines as 4-inch (100 mm) wide, white stripes between contiguous lanes of pavement
carrying traffic in the same direction. Place them as broken lines unless specified
solid. Offset lane lines to the left of the longitudinal joint, if present, or
the theoretical line lying between contiguous lanes, if a joint is not
present. Ensure that the nearer edge of the stripe is 2 inches (50 mm) to the
left of the joint or line. Do not place lane lines through intersections.

C. Center Lines. Place center lines as single or double yellow stripes between contiguous lanes of pavement
carrying traffic in opposite directions. Center line marking includes two-way
left-turn lane striping and the outline of left-turn islands. Make each stripe
4 inches (100 mm) wide, solid or broken as specified.

F. Transverse/Diagonal Lines. Place transverse/diagonal lines as solid 24-inch (600 mm) wide stripes, of the color
specified, and at an angle to the direction of travel.

G. Curb and Island Marking. Prepare exposed surfaces and curbs and paved islands according to 641.05.
In addition, remove and dispose of all visible loose or foreign material,
including vegetation, on and immediately contiguous to surfaces to be marked.

H. Symbol Markings. Place all railroad, school, and handicap symbol markings using white markings. A railroad
marking includes the 16-inch (400 mm) crossbuck, two 72-inch (1.8 m) “R”s, two
24-inch (600 mm) transverse lines, and a stop line. A school marking includes
the word “SCHOOL” and two 16-inch (400 mm) transverse lines.

641.09
Two-Way Radio Communications. If two-way radio equipment is required, furnish and maintain radio equipment
necessary for the voice communication between the striper and the inspector’s
vehicle at all times during the pavement marking operation. Use equipment capable of transmitting and receiving normal voice communications to at least 4
miles (6 km).

641.10
Removal of Pavement Markings. If specified as a pay item, remove pavement
markings as described in 614.11.G. Take care during marking removal not to
scar, discolor, or otherwise damage the pavement surface. Do not overpaint or
use other methods of covering markings instead of removal.

641.11
Deduction for Deficiency. For traffic paint, polyester and epoxy, the Engineer will compute each day the amount of marking material (including all components) and glass beads
applied for each route section on the DLS report for determining unsatisfactory
sections. The Department will reduce the contract price for each route section
in direct proportion to the percent of deficiency of marking material or glass
beads as specified in 642.04, 643.04 and 646.05, up to 20 percent for each
material deficiency. The Department will only use the greater deficiency of
marking material or glass beads to compute the deduction.

If the deficiency of marking material or glass
beads is 20 percent or more, the Department will consider the work
unsatisfactory. In addition, the Engineer will consider as unsatisfactory materials applied outside the temperature or application requirements in Items
642, 643 and 646 without written approval of the Engineer. Replace pavement
markings and glass beads in all sections determined to be unsatisfactory by
retracing over the unsatisfactory markings at the full thickness specified in
Items 642, 643 and 646.

641.12
Method of Measurement. The
Department will measure pavement markings complete in place in the units
designated. The Department will measure line quantities as the length of
completed marking, including the gaps, intersections, and other sections of
pavement not normally marked. The Department will measure the removal of
pavement markings using the same method of measurement as completed markings in
the units designated.

641.13
Basis of Payment. The Department
will pay for accepted quantities of work performed under Items 642, 643, 644,
645, 646, and 647.

The Department will not pay for costs associated
with correcting improperly located lines, replacing reflectors coated with
pavement marking material, or replacing unsatisfactory pavement markings.

The Department will not pay for lines placed using
non-specification materials.

The Department will not pay for non-specification
lines determined through field measurement.

The Department will pay for Two-Way Radio
Equipment at the lump sum bid price.